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Enhancing Curie Temperature for CrTe2-Containing Heterostructures via Interfacial Engineering.
Zihao Fu1, Xin Zhang2, Weilin Liu1
1National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory for Nanotechnology, Jiangsu Physical Science Research Center, School of Physics, Nanjing University, Nanjing 210093, China.
Nano Letters
|March 11, 2026
Summary
Researchers developed wafer-scale, layer-controlled chromium telluride (CrTe2) heterostructures for advanced 2D spintronic devices. This breakthrough enables room-temperature ferromagnetism in two-dimensional (2D) materials, overcoming previous limitations.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Two-dimensional (2D) van der Waals (vdW) ferromagnets are crucial for next-generation spintronics.
- Current limitations include small size, uncontrolled thickness, and suppressed magnetism, hindering room-temperature applications.
Purpose of the Study:
- To achieve wafer-scale growth of layer-controlled 2D vdW ferromagnetic heterostructures.
- To engineer enhanced magnetic properties, specifically a Curie temperature (Tc) above room temperature.
Main Methods:
- Utilized a "high-to-low" temperature growth strategy for wafer-scale fabrication.
- Precisely controlled layer numbers and interface quality in CrTe2-containing vdW heterostructures.
- Grew heterostructures on 4-inch wafers with excellent uniformity.
Main Results:
- Successfully fabricated diverse heterostructures with atomically sharp interfaces and controlled layer numbers.
- Demonstrated robust proximity-induced interfacial magnetic enhancement.
- Achieved a Curie temperature (Tc) up to 300 K in WTe2/6L CrTe2 and PtTe2/6L CrTe2 heterostructures.
Conclusions:
- The study presents a scalable method for producing high-quality 2D magnetic vdW heterostructures.
- This work offers a rational design framework for developing advanced 2D spintronic devices with enhanced magnetic properties.
